2121211112 has 16 divisors (see below), whose sum is σ = 3977833860. Its totient is φ = 1060455424.

The previous prime is 2121211111. The next prime is 2121211139. The reversal of 2121211112 is 2111121212.

It can be written as a sum of positive squares in 2 ways, for example, as 1889988676 + 231222436 = 43474^2 + 15206^2 .

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (2121211111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61448 + ... + 89544.

Almost surely, 2^2121211112 is an apocalyptic number.

It is an amenable number.

2121211112 is a deficient number, since it is larger than the sum of its proper divisors (1856622748).

2121211112 is a wasteful number, since it uses less digits than its factorization.

2121211112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37540 (or 37536 counting only the distinct ones).

The product of its digits is 16, while the sum is 14.

The square root of 2121211112 is about 46056.6076909709. The cubic root of 2121211112 is about 1284.8762389450.

Adding to 2121211112 its reverse (2111121212), we get a palindrome (4232332324).

The spelling of 2121211112 in words is "two billion, one hundred twenty-one million, two hundred eleven thousand, one hundred twelve".